HPLIP

  1. Bug #341827
  2. Comment #31

Comment 31 for bug 341827

Revision history for this message
In , Tim (tim-redhat-bugs) wrote :

So it looks like the usblp module is getting loaded spontaneously. This seems to be because of a spontaneous USB reset:

Sep 15 19:31:38 topaz hp[15869]: io/hpmud/hpmud.c 627: [15869] hpmud_channel_write() dd=1 cd=2 buf=0xbfccc2cc size=8192 sectime=45
Sep 15 19:31:38 topaz kernel: usb 1-7: reset high speed USB device using ehci_hcd and address 3
Sep 15 19:31:38 topaz kernel: usblp0: USB Bidirectional printer dev 3 if 1 alt 0 proto 2 vid 0x03F0 pid 0x4E11
Sep 15 19:31:38 topaz kernel: usb 1-7: usbfs: process 16047 (hp) did not claim interface 1 before use

In this situation the hp backend asks the printer what's up by examining its Device ID. Of course, the printer is happy; the problem is that our USB channel handle is no longer valid.

I've reported this upstream, along with a patch to work around the problem.